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Finding the Fourth Proportional to 5,115.87, 7,672.62 and 1,994.79

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Solution

The fourth proportional to 5,115.87, 7,672.62 and 1,994.79 is: 2,991.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.87 : 7,672.62 = 1,994.79 : x
  2. Step 2: Convert to fraction form
    5,115.87/7,672.62 = 1,994.79/x
  3. Step 3: Cross multiply
    5,115.87x = 7,672.62 × 1,994.79
  4. Step 4: Simplify right side
    5,115.87x = 15,305,265.65
  5. Step 5: Solve for x
    x = 15,305,265.65/5,115.87
  6. Step 6: Final answer
    x = 2,991.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.